//
//  CalculatorBrain.h
//  Calculator
//
//  Created by Tylene Garrett on 5/3/10.
//  Copyright 2010 __MyCompanyName__. All rights reserved.
//

#import <Foundation/Foundation.h>


@interface CalculatorBrain : NSObject 
{
	double operand;
	NSString *waitingOperation;
	double waitingOperand;

}

- (void)setOperand:(double)aDouble;
- (double)performOperation:(NSString *)operation;

@end
